Asked by online sports channel Oh My Goal about his best changing room memory, the world's most expensive player chose the aftermath of that win.
"We all went crazy afterwards." The Brazilian star said in the interview, which was posted on Saturday.
Neymar was speaking on the PSG to stay in Brazil to help his foundation, the Neymar Institute.
His comments are set to further strain his relationship with the club.
He wants out of the Parc des Princes and wants to return to Barca, but is struggling to find suitors due to the 222 million euros ($ 252 million) the capital splashed out to take him away from Barcelona two years ago.
Antoine Griezmann's arrival from Atletico Madrid for 120 million euros.
When Neymar missed last Monday's first training session they would "take appropriate action" against the star.
Sporting director Leonardo has said that "Neymar can leave PSG if there is an offer that suits everybody".
Later Saturday, Neymar added fuel to the fire over the Camp Nou, with an Instagram post.
It was a 10-second video of himself in a Barcelona shirt, his father, and a quote from the Bible: "No weapon turned against you will prosper." (Isaiah Chapter 54, verse 17).
Barcelona's famous rout of Paris Saint-Germain took place in the final 16 stage of the 2017 Champions League.
PSG has won the first leg of that Champions League last 16 tie 4-0 and were seconds away from the quarter finals.
Sergi Roberto for a winner in the 88th and 91st minutes of the famous match before setting up.
That sealed their 6-1 win over PSG, who then shelled out the world-record.
"What we felt when we scored the sixth goal I've never felt anything like that, it's incredible," Neymar told Oh My Goal on Saturday.